I came across an interesting blog post recently by Harry SM7PNV about the Swedish Polar Research vessel Oden. It is currently on its way from Sweden to Greenland and is sending out its location on WSPR by band hopping between the four bands... 40m, 30m, 20m and 17m.
As you can see from the map above, I heard them on 14 MHz.
The WSPR transmitter on the ship is one of Harry's commercial Zachtek products running 300 milliwatts to an end feed wire antenna.
The blog post on Harry's site is here... https://www.zachtek.com/post/zachtek-wspr-transmitter-on-board-polar-research-vessel-oden
Update : By the way, if you are tracking the ship then be sure to use the map on M0XDK's website. The map on the wsprnet website shows the ship in the wrong location.
